Question

Body having meshwork of cells internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of which of the following phylum?
A.Protozoa
B.Coelenterata
C.Porifera
D.Mollusca

Answer 1

The different phylum of the animal kingdom are: Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Mollusca, Arthropoda, Echinodermata, Hermoichordata, and Chordata. The classification of the animal kingdom is based on the cell structure, body design, and mode and source of nutrition.

Complete step by step answer:
Option A) Protozoans normally do not have a cell wall but some organisms possess a thick layer outside of the cell membrane constituting inorganic substances or forms pellicles. They reproduce asexually by budding, fission or schizogony. They have many motile short cilia and more than one flagella.
Option B) Coelenterata are commonly known as Cnidaria and have a body shape of radial symmetry. They are multicellular organisms with few tissues and organelles. The body of the coelenterate forms a mouth and an internal cavity, and forms a simple net-like nervous system. They reproduce sexually or asexually.
Option C) Body having meshwork of cells internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of phylum Porifera. They are mostly marine aquatic and are sessile and sedentary that grow like plants. Their body shape is generally a vase or a cylindrical- shape and is asymmetrical or radially symmetrical. They do not have mouths and instead have pores on their outer walls that are permeable to water.
Option D) Mollusca are bilaterally symmetrical and have an organ system of body organization and are triploblastic, divided into three parts: head, visceral mass, and ventral foot. Their body is unsegmented and covered by a mantle or shell.

Hence the correct answer is option C.

Note:
Taxonomy is the branch of science which deals with the classification and nomenclature of organisms. The sequence of classification is the kingdom, phylum, class, order, family, genus, and species. Later on, the domain was included above the kingdom.